linux-kernel - Re: [PATCH 2/3] x86: x2apic/cluster: Make use of lowest priority delivery mode

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Message-ID: <20120521094601.GE7767@moon>
Date:	Mon, 21 May 2012 13:46:01 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Alexander Gordeev <agordeev@...hat.com>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH 2/3] x86: x2apic/cluster: Make use of lowest priority
 delivery mode

On Mon, May 21, 2012 at 09:11:36AM +0200, Alexander Gordeev wrote:
> 
> > p.s. Hope Suresh and Yinghai will take a look too. The thing which bothers
> > me is that we use LowPrio delivery mode, while there is no lowprio in
> > x2apic ipi messages and I assume the same should apply to ioapic generated
> > messages.
> 
> My understanding of the specification is LowestPrio is not supported only for
> IPIs on x2APIC. Can not imagine why IO-APICs need to be limited here. But let's
> hear what the guys think.

True. This limitation applies to IPIs only.

	Cyrill
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